31020603013 has 4 divisors (see below), whose sum is σ = 31021170048. Its totient is φ = 31020035980.

The previous prime is 31020603011. The next prime is 31020603179. The reversal of 31020603013 is 31030602013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31020603013 - 2¹ = 31020603011 is a prime.

It is a super-2 number, since 2×31020603013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020603011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191503 + ... + 314188.

It is an arithmetic number, because the mean of its divisors is an integer number (7755292512).

Almost surely, 2^31020603013 is an apocalyptic number.

It is an amenable number.

31020603013 is a deficient number, since it is larger than the sum of its proper divisors (567035).

31020603013 is an equidigital number, since it uses as much as digits as its factorization.

31020603013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567034.

The product of its (nonzero) digits is 324, while the sum is 19.

The spelling of 31020603013 in words is "thirty-one billion, twenty million, six hundred three thousand, thirteen".